From 5af72a818612332a11171b16f27a62ec0a0f91d7 Mon Sep 17 00:00:00 2001 From: Andrew Jones Date: Tue, 4 Mar 2025 13:00:17 +0100 Subject: [PATCH] riscv: Fix riscv_online_cpu_vec We shouldn't probe when we already know vector is unsupported and we should probe when we see we don't yet know whether it's supported. Furthermore, we should ensure we've set the access type to unsupported when we don't have vector at all. Fixes: e7c9d66e313b ("RISC-V: Report vector unaligned access speed hwprobe") Reviewed-by: Alexandre Ghiti Signed-off-by: Andrew Jones Link: https://lore.kernel.org/r/20250304120014.143628-12-ajones@ventanamicro.com Signed-off-by: Alexandre Ghiti --- arch/riscv/kernel/unaligned_access_speed.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/riscv/kernel/unaligned_access_speed.c b/arch/riscv/kernel/unaligned_access_speed.c index b7a8ff7ba6df..161964cf2abc 100644 --- a/arch/riscv/kernel/unaligned_access_speed.c +++ b/arch/riscv/kernel/unaligned_access_speed.c @@ -367,10 +367,12 @@ static void check_vector_unaligned_access(struct work_struct *work __always_unus static int riscv_online_cpu_vec(unsigned int cpu) { - if (!has_vector()) + if (!has_vector()) { + per_cpu(vector_misaligned_access, cpu) = RISCV_HWPROBE_MISALIGNED_VECTOR_UNSUPPORTED; return 0; + } - if (per_cpu(vector_misaligned_access, cpu) != RISCV_HWPROBE_MISALIGNED_VECTOR_UNSUPPORTED) + if (per_cpu(vector_misaligned_access, cpu) != RISCV_HWPROBE_MISALIGNED_VECTOR_UNKNOWN) return 0; check_vector_unaligned_access_emulated(NULL); -- 2.51.0